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4.  eBGP WITH MULTIHOP COMMAND (LOAD BALANCING)

HOW TO eBGP WITH MULTIHOP COMMAND (LOAD BALANCING)
 
Interface IP Address Configuration 
 
R1 
 
Interface       IP Address   Subnet Mask 
S 0/2/0          1.1.1.1           255.0.0.0 
S 0/2/1          2.2.2.1           255.0.0.0 
E 0               10.1.1.1         255.0.0.0 
Loopback 0 50.50.50.50  255.255.255.255 
 
R2 
 
Interface       IP Address    Subnet Mask 
S 0                1.1.1.2            255.0.0.0 
S 1                2.2.2.2            255.0.0.0 
E 0                20.1.1.1          255.0.0.0 
Loopback 0 75.75.75.75  255.255.255.255 
 
Task 1: 
 
Configure a BGP neighbor relationship between R1 and R2. R1 should be configured in 
AS 100 and R2 should be in AS 200. Establish the neighbor relationship between peers 
using loopbacks. Create a static route on each router to accomplish this task. 
 
R1 
 
Ip route 75.75.75.75 255.255.255.255 1.1.1.2 
Ip route 75.75.75.75 255.255.255.255 2.2.2.2 
 
Router bgp 100 
Neighbor 75.75.75.75 remote-as 200 
Neighbor 75.75.75.75 update-source 
loopback 0 
Neighbor 75.75.75.75 ebgp-multihop 
Network 1.0.0.0 
Network 2.0.0.0 
No synchronization 
 
R2 
 
Ip route 50.50.50.50 255.255.255.255 1.1.1.1 
Ip route 50.50.50.50 255.255.255.255 2.2.2.1 
 
Router bgp 200 
Neighbor 50.50.50.50 remote-as 100 
Neighbor 50.50.50.50 update-source 
loopback 0 
Neighbor 50.50.50.50 ebgp-multihop 
Network 1.0.0.0 
Network 2.0.0.0 
No synchronization
 
Verification: 
 
R1#show ip bgp summary 
 
R1#show ip route
 
Routing table displays two choices to reach the next hop 75.75.75.75, one via 2.2.2.2 and 
the other via 1.1.1.2. 
 
The load balancing can be verified by issuing the traceroute command: 
 
R1#traceroute 75.75.75.75
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